| 摘要 |
<p>A near infrared screening film which consists of a biaxially oriented film made from a polyester containing a near infrared light absorber having a weight reduction start temperature of at least 280 DEG C and which has a haze value of 5 % or less and a total transmittance for visible lights having a wavelength of 400 to 650 nm of 40 % or more and which is exemplified by having optical properties at visible and near infrared ranges which satisfy the following expressions (1) to (4): <DF NUM="(1)">1 < T(850) < 20 </DF> <DF NUM="(2)">1 < T(950) < 20 </DF> <DF NUM="(3)">- 10 < T(620) - T(540) < 10 </DF> <DF NUM="(4)">- 10 < T(450) - T(540) < 10 </DF> wherein T(450), T(540), T(620), T(850) and T(950) are light transmittances at wavelengths of 450 nm, 540 nm, 620 nm, 850 nm and 950 nm, respectively. <??>This film is inexpensive, has high handling ease, a high visible light transmittance and the function of preventing the malfunction of peripheral equipment caused by near infrared lights from the screen of a plasma display, for example, and can be suitably used in the front panel of the plasma display. <IMAGE></p> |
